Chemical Interactions I-check 9

What happens in a chemical reaction?

• Atoms from the reactants rearrange and form new substances

• Atoms from the products rearrange and form new reactants

• New atoms appear in the reactants

• Atoms from the reactants dissappear

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A scientist prepared a closed container for a chemical reaction. She poured two liquids into the bottle and quickly closed the bottle with the balloon stopper. The mixture bubbled and the balloon began to inflate. Explain why the balloon inflated.

• New substances formed particles that are bigger than the ones before.

• The liquids reacted together and created more matter

• A new gas was created and the gas took up more space

• The scientist did not seal the system fast enough and more air got in.

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Look at the image: The different-shaded circles represent different kinds of atoms. When circles are touching, they indicate that those atoms make up one molecule. Which of them represents a possible chemical reaction?

• Reaction A

• Reaction B

• Reaction C

• Reaction D

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What is the chemical equation for the molecule in the image.

• O₃₄

• ZnClOH

• ZCOH

• C₈H₁₆OZN

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NGSS.MS-PS1-1

How many atoms are in this formula in the picture?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

How many elements are in the formula in the image?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

What is the Chemical Formula for the image?

• ZNCOH

• ZnClOH

• C₂H₆O

• C₁₂H₆O₄

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How many atoms are in the fomula in the image?

• 2

• 4

• 8

• 9

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How many elements are in the formula in the image?

• 4

• 3

• 2

• 1

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Consider substances found occuring naturally in the environment and synthetic substances created by humans in laboratories and select ALL that occur in both places.

• Made of Atoms

• Can be toxic

• Can be a product of a chemical reaction

• Is made of matter

• Is made of elements

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